I have already done this but ShabbyPenguin doesn't want anyone else mirroring his files. If you want a flashable zip to switch back to TWRP quickly just follow these directions.
(1) Use root explorer to extract all the contents of the flashable zip for cwm.
(2) Delete the recovery.img (cwm) from the folder that the contents were extracted to.
(3) Extract the recovery.img (twrp) from the .tar file that it comes in and put it in the folder that you extracted the cwm zip to
(4) Change the name of the folder that the recovery.img and META-INF are inside of from cwm-recovery to twrp-recovery then use root explorer to zip it back up.
That's all there is to it.
Edit: If you don't have root explorer you can use this file manager
https://play.google.com/store/apps/...app&pcampaignid=APPU_1_PpjvVO-KA-ySsQTKjIK4Aw
It is made by the same dev as root explorer, is free, and has all the same capabilities except it doesn't have root access. The default path that it extracts files to is /storage/emulated/0/speedsoftware/extracted
The new zip you make will go to /storage/emulated/0/speedsoftware/archives